<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
        <style type="text/css">
            #btn{
                display: block;
                width: 90%;
                height: 50px;
                margin: 0px auto;
            }
        </style>
    </head>
    <body>
        <button id="btn" type="button" class="mui-btn mui-btn-blue mui-btn-block">按钮</button>
        <script type="text/javascript">
            document.querySelector('#btn').addEventListener('click',function () {
                var REQUESTCODE = 1;
                var main = plus.android.runtimeMainActivity();
                var Intent = plus.android.importClass('android.content.Intent');
                var intent = new Intent(Intent.ACTION_GET_CONTENT);

                intent.setType("*/*");//设置类型，任意类型
                //intent.setType("image/*");
                //intent.setType("audio/*"); //选择音频
                //intent.setType("video/*"); //选择视频 （mp4 3gp 是android支持的视频格式）

                intent.addCategory(Intent.CATEGORY_OPENABLE);
                main.startActivityForResult(intent,REQUESTCODE);

                main.onActivityResult = function(requestCode, resultCode, data) { 
                    if (REQUESTCODE == requestCode) {
                        var context = main;
                        plus.android.importClass(data);
                        // 获得文件路径
                        var fileData = data.getData();  
                        var path = plus.android.invoke(fileData, "getPath");
                        console.log("path:"+path);

                        // 判断文件类型
                        var resolver = context.getContentResolver();
                        var fileType = plus.android.invoke(resolver, "getType",fileData);
                        console.log("fileType:"+fileType);
                    }
                }
            })
        </script>
    </body>
</html>